What forces act on a skier? I do not want the answer to this question. What I do not understand is why the net force while the skier is accelerating is Fnet=Fthrust-FG. Can someone explain why normal force is not included? Thank you! :) Sam (75kg) takes off up a 50m high, 10 degree frictionless slope on his jet-powered skis. The skis have a thrust of 200N. He keeps his skis tilted at 10 degrees after becoming airborne.